Aibu party no show

[Prettylittlepointeshoe]

DS had 6th birthday party at climbing wall/adventure park. Invited 8 friends, had to pay upfront for all guests.

DS invited good friend from school who we've had round for playdates/tea. His mum accepted invite (after chasing!!) and texted a couple of times about it the week before party.

On the day friend doesn't show..... texted friends mum to see if they were on their way..... reply was that they weren't coming as the friend had gone out for the day with another friend!!!

Aibu to think this is really rude??? DS had wanted to invite another out of school friend but couldn't as we were already full on numbers.

Don't understand why the mum just didn't let me know they weren't coming??!!!!

I'd lay it on thick about how upset my ds was, and how his disapointment would have been less if he'd have been able to invite another friend instead, being as you'd already paid the cost. Guilt her by not really making it about the money but slip it in that it's cost you money too.

Yes everyone else came and had a great time

I'd be mortified if I just didn't turn up at a party!!!! What happened to polite manners???!!

Completely agree with pps that this is so rude! Have you responded to the other mum's text at all?

Totally wrong but normal from my experience sadly.

Rude to accept then not show up & even ruder to go on a day out with a different friend!